Kemp, 21, becomes the Astros highest selection to sign since last weekend's draft. A second baseman out of Vanderbilt, Kemp was this year's SEC Player of the Year after leading the SEC in batting average, on-base percentage, runs and stolen bases. He was also a first-team All-American and finished his season ranking second in the NCAA in hits and 13th in batting average. Kemp was signed by Astros Area Scout Nick Venuto.

"Tony has been the spark atop the Vanderbilt lineup the past few years and we are thrilled to add him to the Astros organization," said Elias. "He has been a success everywhere he has played and brings energy, game-changing speed and defensive versatility to the field every day. He has excited our scouts all year and we expect Astros fans will feel the same when they see him play."

Martin, 17, is the first high school player to sign with Houston. He played last year at Orange Lutheran HS in California and was named a Rawlings Third Team All-American and to the California All-Region First Team. Martin was signed by Astros Area Scout Brad Budzinski.

"Jason has what we call a 'strong profile' for a center fielder - he's fast, he's a left-handed hitter, he works good at-bats and he can hit - all ingredients to develop into a prototypical leadoff man one day," said Elias. "He impressed our scouting staff this spring with his consistent and energetic play and is only 17 years old, so we are looking forward to watching him grow and advance in our system."